Hydroelectric installation



Aug. 8, 1933. R. BLOM 1,921,905

HYDROELECTRIC INSTALLATION Filed July 28, 1951 Patented Aug. 8, 1933HYDROELECTRIC INSTALLATION Robert Blom, Paris, France Application July28, 1931, Serial No. 553,620, and in Germany July 28, 1930 1 Claim. (01.290-4) In most cases where it is necessary to raise water to a higherlevel than that at which it stands, pumps are utilized which receive themechanical energy necessary for their operation from some externalsource.

The object of the present' invention relates to an installation forperforming a process permitting (Fig. 1) when disposing of water at alevel A, of raising a portion of this water to a higher level B, whilstutilizing as motive power that which can be derived from the fall of theother portion of the water in A to a lower level U.

Figures 1 to 4 inclusive show respectively several modifications of thesaid installation.

The process can be summarized as follows:

A portion of the water in the reservoir A is to be pumped into thereservoir B.

Devices C1 are installed to allow thetransfer in U of water from thereservoir A,- under a head of H1 representing the difference in heightbetween the levels A and U.

Devices C2 are installed to permit the elevation into the reservoir B ofthe water available in U; the height of elevation H2 is the differencein height between the levels 13 and U.

Let Q denote the total quantity of water derived from A and which isavailable in U under a head of H1 at the outlet of the piping C1. Thisquantity of water is divided into two portions qr and 112. The portionq1 is sent into a hydraulic turbine T and the portion qz into a pump P.

The turbine receives water under a head of H1 and after utilizing samedischarges it at zero pressure. The pump receives water under a head ofH1 and forces it under a head of H2. The turbine and pump located in Uare coupled mechanically. The energy required by the pump to elevate thequantity of water qz through the height H2H1=h is supplied by theturbine which utilizes the fall of the quantity Q1 of Water under thehead of 1-11.

In short, disposing of the quantity Q of water in A, a portion qz ofthis quantity is raised into 13, whilst the balance qi, is utilized inthe production of the necessary motive power.

The advantage of this process is to procure a higher general efiiciencythan that obtainable by all other pumping systems in current use.

The arrangement permitting the application of this process is realized(Fig. 2) by means of the turbine T and the pump P mechanically coupledtogether and both fed with water derived from the reservoir A. The twomachines may be of any type. A dynamo-electric machine may be mounted onthe extremity of the shaft and utilized either as generator or as motorso as to complete the operation of the group.

The regulation of the speed of the group can be realized by means of asingle regulator acting either on the distributor of one of the machinesor on the two distributors (turbine and pump) interconnected inaccordance with a convenient law. The distribution of the availablewater in its two proportions, driving water and pumped water, can underthese conditions be automatic.

Another embodiment permitting the application of the said process isrealized by means of a single machine (Fig. 3) comprising a single shaftcarrying a turbine rotor and a pump rotor and a single inflow casingfeeding the two rotors. The two distributors can then be combined so asto automatically proportion the admitted water between the two rotors.

The machine at the outlet of the turbine rotor is provided with anoutflow orifice for the expended water, and at the outlet of the pumprotor with an orifice for the forced water whose pressure has beenincreased.

Another application of the process allows the realization of hydraulicaccumulation for the regulation of the output of hydro-electricstations.

In such a case the turbo-pump group can dependent alternator E2 (Fig. 1)or be mounted on the shaft of the turbo-pump, in which case it willdrive the alternator E of this group Figure 4.

Having now particularlydescribed and ascertained the nature of my saidinvention and in what manner the same is to be performed, I declare thatwhat I claim is:

An hydro-electric installation, comprising a head reservoir, a storagereservoir, an electric machine, a pump feeding the storage reservoir, afirst turbine adapted to actuate the electric machine and the pump, anda second turbine for-actuating the electric machine, said pump, turbinesand electric machines being mechanically coupled together, the pump andfirst turbine being fed from the head reservoir at the.

same pressure, and the second turbine fed from the storage reservoir.

ROBERT BLOM.

